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Ham and Gruyere Potato Gratin: A Comfort Food Classic

My grandmother, bless her heart, wasn’t much of a risk-taker in the kitchen. Her repertoire consisted mostly of tried-and-true classics, dishes that evoked a sense of warmth and home. Among her most cherished recipes was a simple potato gratin, a humble dish that she elevated with love and, of course, plenty of cheese. While her version was decidedly less sophisticated than this Ham and Gruyere Potato Gratin, it provided the inspiration. The earthy potatoes, creamy sauce, and salty ham create a symphony of flavors that bring me right back to her cozy kitchen. This dish is a celebration of simple ingredients transformed into something truly special.

Recipe Overview

Prep Time: 25 minutes
Cook Time: 1 hour 25 minutes
Total Time: 1 hour 50 minutes
Servings: 8
Yield: 1 gratin
Dietary Type: Not Gluten-Free

Ingredients

2 ½ cups low-fat milk
2 tablespoons all-purpose flour
¾ teaspoon salt
½ teaspoon black pepper
2 teaspoons butter
½ cup finely chopped onion
1 ¼ cups shredded gruyere cheese, divided
2 lbs Yukon Gold potatoes, cut into ⅛ inch thick slices
Cooking spray
4 ounces ham, chopped

Equipment Needed

11 x 7 inch baking dish
Whisk
Medium saucepan
Food processor or mandoline (optional, for slicing potatoes)
Aluminum foil

Instructions

Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius).
In a medium bowl, combine the milk, all-purpose flour, salt, and black pepper. Whisk vigorously until the flour is fully incorporated and no lumps remain. Set this mixture aside.
In a medium saucepan, melt the butter over medium heat. Add the finely chopped onion and cook for approximately 3 minutes, or until the onion becomes tender and translucent. Stir frequently to prevent burning.
Pour the milk mixture into the saucepan with the softened onions. Bring the mixture to a gentle boil over medium heat, stirring constantly to prevent scorching. Once boiling, reduce the heat slightly and cook for an additional 2 minutes, continuing to stir constantly. The sauce should thicken slightly.
Remove the saucepan from the heat and add ¾ cup of the shredded gruyere cheese. Stir continuously until the cheese is completely melted and the sauce is smooth and creamy. This step is crucial for achieving the perfect texture.
Prepare your 11 x 7 inch baking dish by coating it generously with cooking spray. This will prevent the gratin from sticking and make serving easier.
Arrange half of the potato slices in a single layer at the bottom of the prepared baking dish, slightly overlapping them.
Pour half of the cheese sauce evenly over the layer of potatoes. Ensure that all the potatoes are coated in the sauce.
Sprinkle the chopped ham evenly over the sauce-covered potatoes.
Top with the remaining potato slices, arranging them in a similar manner as the first layer.
Pour the remaining cheese sauce over the second layer of potatoes, ensuring they are also evenly coated.
Sprinkle the remaining ½ cup of shredded gruyere cheese evenly over the top of the entire gratin.
Cover the baking dish tightly with a sheet of aluminum foil. To prevent the cheese from sticking to the foil, lightly coat the side of the foil that will be touching the cheese with cooking spray.
Bake the covered gratin in the preheated oven for 40 minutes.
Carefully remove the foil from the baking dish and continue baking, uncovered, for an additional 45 minutes, or until the potatoes are tender when pierced with a fork and the cheese is melted, golden brown, and bubbly.
Once cooked, remove the gratin from the oven and let it stand for at least 5 minutes before serving. This allows the sauce to set slightly and prevents it from being too runny.

Expert Tips & Tricks

Potato Prep is Key: Uniformly thin potato slices are essential for even cooking. If you don’t have a food processor or mandoline, aim for consistent slices with a sharp knife. Uneven slices will result in some potatoes being undercooked while others are mushy.
Don’t Skip the Slurry: The flour-milk mixture, or slurry, is what thickens the sauce. Make sure there are no lumps before adding it to the hot butter and onions. A smooth slurry ensures a smooth sauce.
Cheese Choice Matters: Gruyere adds a nutty, complex flavor that complements the potatoes and ham perfectly. If you must substitute, choose another good melting cheese like Swiss, but be aware that it will slightly alter the richness of the dish.
Prevent Sticking: Besides coating the dish with cooking spray, you can also lightly grease the bottom with butter for extra insurance against sticking.
Make-Ahead Option: You can assemble the gratin up to a day in advance. Cover it tightly and refrigerate. Add about 15-20 minutes to the baking time when cooking from cold.

Serving & Storage Suggestions

Serve the Ham and Gruyere Potato Gratin warm, directly from the baking dish. It’s a wonderful side dish for roasted chicken, pork, or beef. For a more substantial meal, serve it with a simple green salad and crusty bread.

Leftovers can be stored in an airtight container in the refrigerator for up to 3-4 days. To reheat, cover the dish with foil and bake at 350°F (175°C) until heated through, about 20-30 minutes. You can also microwave individual portions for a quicker reheat. The texture may change slightly upon reheating, but the flavor will remain delicious.

Freezing is not recommended as the sauce may separate upon thawing, altering the texture and appearance.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	257.7 kcal	N/A
Calories from Fat	91 g	35%
Total Fat	10.2 g	15%
Saturated Fat	5.8 g	29%
Cholesterol	39.1 mg	13%
Sodium	540.7 mg	22%
Total Carbohydrate	28.9 g	9%
Dietary Fiber	2.3 g	9%
Sugars	1.5 g	5%
Protein	13.2 g	26%

Note: Nutritional information is an estimate and may vary based on specific ingredients and portion sizes.

Variations & Substitutions

Vegetarian Option: Omit the ham altogether for a classic potato gratin. You can add other vegetables like sautéed mushrooms or spinach for added flavor and texture.
Cheese Variations: While Gruyere is the star, you can experiment with other cheeses like fontina, Jarlsberg, or even a sharp cheddar for a different flavor profile.
Garlic Infusion: Add a clove of minced garlic to the onions while they are sautéing for a subtle garlic flavor.
Herby Twist: Sprinkle fresh thyme or rosemary leaves over the potatoes before baking for an aromatic touch.

FAQs (Frequently Asked Questions)

Q: Can I use a different type of potato?
A: While Yukon Gold potatoes are recommended for their creamy texture, you can use other varieties like Russet or red potatoes. Keep in mind that the cooking time may vary slightly depending on the potato.

Q: How do I prevent the potatoes from browning on top while baking?
A: If the top of the gratin is browning too quickly, simply cover it loosely with aluminum foil for the remaining baking time.

Q: Can I add other vegetables to this gratin?
A: Absolutely! Sautéed mushrooms, caramelized onions, or steamed green beans would be delicious additions to this dish. Add them along with the ham layer.

Q: The sauce seems thin before baking. Is that normal?
A: Yes, the sauce will thicken as it bakes in the oven. The potatoes will absorb some of the liquid, resulting in a creamy and delicious gratin.

Q: Can I use pre-shredded cheese?
A: Freshly shredded cheese melts more smoothly and evenly. Pre-shredded cheese often contains cellulose, which can prevent it from melting as well.

Final Thoughts

This Ham and Gruyere Potato Gratin is more than just a recipe; it’s an invitation to create a comforting and memorable meal. From the satisfying layers of thinly sliced potatoes to the rich, cheesy sauce and the salty kick of ham, every bite is a celebration of simple pleasures. So, gather your ingredients, preheat your oven, and prepare to be transported to a place of warmth and culinary bliss. Don’t hesitate to adjust the flavors to your liking and make it your own. And most importantly, don’t forget to share your creations and experiences with those you love. After all, food is best enjoyed in good company!

Ham and Gruyere Potato Gratin Recipe